Fanuc Servo Amplifier

The connection of FANUC servo control system, whether αi or βi servo,In the peripheral connection circuit has many similar places, roughly divided into optical cable connection, control power supply connection, main power supply connection, emergency stop signal connection, MCC connection, spindle instruction connection (refers to the serial spindle, analog spindle connected in the frequency converter), servo motor main power supply connection, servo motor encoder connection and so on.Currently, commonly used servo amplifier types are αi service amplifier, βi svSP(integrated structure), βi sVM (I/O Link), βiSVM (FSSB) and so on.

1)αi return amplifier

FANU αi Series servo amplifier (SVM) is used to drive the motor of series service,Its advantage is its small size (there are 60,90,150,300 widths), low power dissipation

(about 10% less than series α),There are two types: normal and high pressure,A power module (PSM) is required.

Figure (1) ai amplifier connection diagram

Note: ①After the main circuit breaker is switched on, the CX1A interface inputs AC200V voltage for servo amplifier control.

② Introduce DC24V through AC200V of PSM as the control power supply. Supply DC24V to each module through the CXA2A and CXA2B ports.

③ After the power of CNC is connected and the emergency stop is released, MCC sucking signal MCON is sent out through FSSB optical cable. At the same time, the servo amplifier's emergency stop signal was removed through the servo amplifier interface CX4.

④ The CX3 port is used to close the internal MCC to control the peripheral power cable.

⑤ PSM input AC200V power supply after rectification, converted into DC300V output. It should be noted that it takes about 3 seconds for DC300V in PSM to be connected after the power is connected. After the power is cut off, the discharge time needs more than 20 minutes. After the power supply is cut off, it is dangerous to touch the terminal.

⑥ The wiring of JF1/JF2/JF3 is mainly the feedback signal of the servo motor, including the detection signal of the position, speed and rotation Angle of the motor.

⑦ COP10B is a servo serial bus (FSSB) interface, and the CNC system of COP10A connection, COP10A is a servo serial bus interface, and the next servo unit of COP10B connection (optical cable).

2) βi servo amplifier with spindle

For the βi series of servo amplifier module, the amplifier SPVM with spindle is a monolithic amplifier, and the connection is shown in Figure(2).Three (or two) servo motor power line amplifier plug box is different,CZ2L(the first axis), CZ2M(the second axis), CZ2N(the third axis) corresponding to XX, XY, YY, the general FANUC company provides power lines, the plug box is placed separately, users according to the actual situation into the. So pay attention to one-to-one correspondence when loading.

Figure (2) Connection diagram of Bi amplifier with spindle

Description: ① the main circuit breaker is switched on, TB1 interface input servo amplifier control with AC200V voltage.

② CZ2L/CZ2M/CZ2N(K21) is used to drive the motor for rotation of the interface.

③ COP10B, CX4(*ESP), CX3(MCC), motor feedback JF/JF2/JF3(K22) as reference αi the amplifier.

④ On βi amplifiers, there is no DC 300V short-circuit bar on PSM in ai series amplifiers. However, the amplifier will still convert the AC 200V power input amplifier into DC300V voltage, which is indicated by a special LED indicator light on the amplifier. After the power is cut off, the discharge time needs more than 20 minutes. After the power supply is cut off, it is dangerous to touch the terminal.

⑤ The power line and feedback line of the servo motor are shielded, so it is necessary to ground the shielding, and the signal line and power line should be grounded separately to avoid alarm due to interference.

3) βi service amplifier without spindle

For the βi servo amplifier series without spindle, the amplifiers are single-axis or dual-axis type without independent power module, which can be divided into three specifications: SVM1-4/20, SVM40/80 and two-axis SVM2-20/20. The main difference lies in the connection between the power supply and the motor power line.

L1, L2, and L3: input ports of the main power supply.

U, V, W: power line interface of servomotor.

CXA19B: Power input port for the DC24V control circuit, connecting to the external 24V regulated power supply

CXA19A: Power output port of the DC24V control circuit, connecting to the next CXA19B of the same service unit.

COP10A: Servo Serial Bus (FSSB) interface to the COP10B of the next servo unit (optical cable).

COP10B: Servo Serial bus (FSSB) interface for connection with COP10A of CNC system (optical cable)

JX5: Signal interface of servo detection board.

JF1: Servo motor is equipped with encoder signal interface.

CX5X: The servomotor encoder is the battery interface of the absolute encoder.

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